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Thinking about adding a conservatory to your home? Or maybe you’re wondering whether it’s worth it? From costs and planning rules to common concerns, we’ve covered everything in this guide. Let’s go!
What’s the Average Cost to Replace a Conservatory?
Conservatories can vary significantly in price depending on size, materials, and design. Here’s a rough guide:
- Basic uPVC conservatory: £12,000 +
- Mid-range conservatory (with better glazing & roofing): £12,000 – £25,000
- High-end or bespoke conservatory: £25,000+
Key cost factors:
- Foundations – Essential for stability.
- Roof type – Solid roofs cost more but improve insulation.
- Glazing – Double or triple glazing impacts the price.
- Extras – Heating, lighting, and flooring can add costs.
Tip: If you’re on a budget, consider refurbishing an existing conservatory instead of replacing it entirely.
Why Are Conservatories Going to Be Banned?
There’s a lot of talk about conservatories being restricted due to environmental concerns. In some cases, councils discourage poorly insulated conservatories that waste energy. However, there’s no outright ban, but future regulations may tighten.
Common worries:
- Do conservatories devalue a house?
- Poorly built or outdated conservatories might reduce appeal.
- A modern, well-insulated design can add value.
- Do conservatories always leak?
- Not if built correctly! Proper seals and regular maintenance prevent leaks.
- Are conservatories worth the money?
- If designed well, they can increase living space and boost property value.
Is It Cheaper to Have an Extension or a Conservatory?
In most cases, a conservatory is the cheaper option compared to a full extension. Here’s a rough comparison:
| Feature | Conservatory | Extension |
|---|---|---|
| Cost | £12,000 + | £25,000 + |
| Planning Permission | Usually not required | Often required |
| Usability | Best for summer use | Year-round functionality |
Key factors to consider:
- Heating & insulation – A conservatory can be too hot in summer and too cold in winter.
- Long-term value – Extensions generally add more to a home’s resale price.
- Speed of installation – Conservatories are quicker to install than full extensions.
Alternative: If you want year-round use, a garden room might be a better investment.
What Is the Four-Year Rule for Conservatories?
The four-year rule refers to unauthorised structures that have been standing for four years without enforcement action. If a conservatory was built without permission and the council hasn’t objected in four years, it may be allowed to stay.
However, this rule is changing, and some councils no longer recognise it. Always check with your local authority.
Do I Need Planning Permission for a Conservatory?
Most conservatories fall under permitted development if they meet these conditions:
- No taller than 4m (or 3m if within 2m of a boundary).
- No more than half the size of the original house.
- Not on the front of the house (unless replacing an existing structure).
Exceptions: Listed buildings or conservation areas may require special permission.
What’s the Lifespan of a Conservatory?
A well-maintained conservatory can last 20-30 years. Here’s what affects longevity:
- Materials – uPVC lasts ~20 years, aluminium and timber last longer.
- Roof type – Glass and solid roofs outlast polycarbonate.
- Maintenance – Regular cleaning and resealing extend life expectancy.
Tip: If your conservatory is over 15 years old, consider upgrading the roof to improve insulation.
What’s the 10-Year Rule for Conservatories?
The 10-year rule is similar to the four-year rule but applies to broader planning regulations. If a conservatory has been up for 10 years or more, it may no longer be subject to enforcement action, even if built without permission.
Check with your local council to see how they enforce these rules.
Does a Conservatory Increase Council Tax?
Usually, no, but there are exceptions:
- If the conservatory is fully integrated into the house with a permanent heating system, it might be reassessed.
- If you remove the original external doors between the house and conservatory, it could count as a habitable room.
Tip: Keeping the original doors in place avoids a tax reassessment.
Can You Turn a Conservatory into a Proper Room?
Yes! You can make a conservatory more like an extension by:
- Upgrading to a solid or warm roof.
- Adding proper heating (radiators or underfloor heating).
- Improving glazing with double or triple-pane windows.
- Using internal doors to integrate it into the house.
Note: Some modifications might require planning permission.
Final Thoughts
A conservatory can be a fantastic home addition, if done right. Whether you’re looking for extra living space, a bright garden room, or an affordable alternative to an extension, the key is choosing the right materials, ensuring good insulation, and following planning rules.
Have questions about installing or upgrading a conservatory? Drop in our showroom and see how we can help you with your new conservatory project.
By Jessica Stevens
